Buying a 6 month round-trip international ticket but also flying domestic with same airline during the 6mo. void. Is OK?

I want to buy a 6 month round-trip international ticket from the US. After using the first leg, I plan to continue travelling on other airlines and return to the US about a month later.
I then plan to do some domestic and possibly international travel during that time on the carrier I bought the round-trip ticket from. I will return to the original round-trip location to take the return flight home. Will this cause a problem?
Best Answer
That should not be an issue. You can book other flights between the legs of a ticket, with the same and other airlines, as much as you want (and can fit in).
You can even book other round-trips that overlap the started one.
Example: ticket A out on 1., back on 20. Buy another ticket B out on 15, back on 30. Buy a reverse ticket C, ‘back’ on 7., ‘out’ on 25. Then fly the six legs on their proper days, but in a wild sequence: A out, C back; B out, A back; C out, B back.
For people that fly every week, this is a common way to save money, as tickets spread over more than a week are typically cheaper.
The only thing you can’t do is skip any leg on a multi-leg or round-trip ticket - you typically void = lose all following legs of that ticket.
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What happens if you buy a round trip ticket?
A roundtrip flight is a flight itinerary that includes one flight to a destination and another flight back from that destination, such as flying from NYC to Paris and then Paris back to NYC. The route may include layovers or connections, but the start and endpoint are the same.How long is a round trip airline ticket good for?
The cheapest round trip tickets often have a maximum duration of stays up to 1 month, but some airlines do offer return tickets with up to 1 year stay at reasonably rates and you can change the return date by paying the fare difference plus a change fee, the amount depending on the airlines and fare class you book.Can I buy a round trip ticket and only use the return flight?
For example, you can't buy a roundtrip ticket and only use the return flight; you can't combine two or more roundtrip excursion fares end-to-end for the purpose of circumventing minimum stay requirements (back-to-back ticketing); and it's illegal to book a ticket in someone's name without the person's consent.Can you do a round trip flight with two different airports?
Can you do roundtrip from different airports? Yes. If you depart from one airport but return to another, or fly to one airport and return from another, this is called an open-jaw flight.HOW TO FIND CHEAP FLIGHTS - My Best Tips After Booking 500+ Flights
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